# Multiple choice question for engineering

## Set 1

1. The cement concrete, from which entrained air and excess water are removed after placing it in position, is called ________

a) Vacuum concrete

b) LWC

c) Prestressed concrete

d) Sawdust concrete

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2. Light weight cement content for compressive strength 3000 psi is __ pounds per cubic yard.

a) 400-510

b) 440-560

c) 530-660

d) 630-750

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3. The light-weight concrete is prepared by ____________

a) Mixing Portlandcement with sawdust in specified proportion in the concrete

b) Using coke-breeze, slag as aggregate in the concrete

c) Mixing Al in the concrete

d) Mixing Fe in the concrete

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4. Aerated Concrete is ______________

a) Very heavy weight

b) Heavy weight

c) Medium weight

d) Light weight

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5. Entrainment of air also improves workability and durability.

a) True

b) False

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6. No fines concrete is manufactured by _____________

a) By adding no fines materials from normal concrete

b) By eliminating no fines materials from normal concrete

c) By reducing its strength

d) By increasing its strength

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7. Density of no fines concrete with light weight aggregate vary from ________ kg/m^{3}.

a) 1600-1900

b) <300

c) >2500

d) >300

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^{3}.

8. “In bridges, HDC is used”. Is it true or false?

a) True

b) False

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9. What is the value of modulus of elasticity for Sulphur infiltered concrete?

a) 60-115 MPa

b) 10-16 MPa

c) 35-50 GPa

d) 500 GPa

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10. Diameter of Round Steel Fiber lies in the range of ________ mm.

a) .3-.5

b) .25-.75

c) .155-.41

d) .25-.90

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## Set 2

1. Why do we need Standard Consistency Test?

a) To determine the quality of cement

b) To determine the quality of water

c) To determine the quality of mixed concrete

d) To determine the strength of concrete block

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2. What is standard consistency?

a) Consistency which permits the Vicat’s plunger

b) Ability of cement to maintain a constant volume

c) Durability in sea water

b) Free lime content

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3. When the cement paste is tested within the gauging time. Here what is the value of gauging time?

a) 3 to 5 minutes

b) 3 to 5 hours

c) 24 minutes

d) 24 hours

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4. How many moulds required for compression strength test of cement?

a) 1

b) 2

c) 3

d) 4

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5. Which of the following option is correct?

a) Standard consistency (%) = (wt of water added/ wt of cement) *100

b) Standard consistency (%) = (wt of water added- wt of cement) *100

c) Standard consistency = (wt of water added/ wt of cement) *100

d) Standard consistency (%) = (wt cement/ wt of water) *100

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6. Standard consistency of cement is tested by ___________

a) Vicat apparatus

b) Le Chatalier apparatus

c) Soundness meter

d) Duff Abrams apparatus

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7. Calculate standard consistency(%) when 100 ml of water is added in 1000 g of cement.

a) 10

b) 1000

c) 100

d) 1

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8. For making cement paste, what is the amount of water we need?

a) 25% water by weight of dry cement

b) 30% water by weight of dry cement

c) 78% water by weight of dry cement

d) 80% water by weight of dry cement

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9. What is the normal consistency for OPC?

a) 26 to 33%

b) 20 to 35%

c) 26 to 50%

d) 33 to 55%

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10. The relative humidity of laboratory should be ___________ for standard consistency.

a) 65 ± 5%

b) 27 ± 2%

c) 50 ± 5%

d) 45 ± 10

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## Set 3

1. Pick up the most appropriate statement from the following:

a) Bulk density of normal weight aggregate is 1600 kg/m^{3}

b) Bulk density of normal weight aggregate is 2000 kg/ m^{3}

c) Bulk density of normal weight aggregate is 1000 kg/ m^{3}

d) Bulk density of normal weight aggregate is 1250 kg/ m^{3}

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^{3}and the rest of the options don’t come under that range.

2. The 28 days cube strength of mass concrete using aggregates of maximum size 5 cm for gravity dams should be

a) Between 150 to 300 kg/cm^{2}

b) Between 350 to 600 kg/cm^{2}

c) Between 150 to 400 kg/cm^{2}

d) Less than 200 kg/cm^{2}

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^{2}.

3. The unit weight of heavy weight concrete varies from __________ kg/m^{3}.

a) 1000

b) 2400

c) 2000

d) 1400

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^{3}with sp.gr range from 4.0 to 4.6. (eg: mineral ore sand barite).

4. The use of crushed aggregates may results in 10 to 20% higher compressive strength. Is this statement true or false?

a) True

b) False

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5. S.I. unit of bulk density

a) kg/l

b) g/ml

c) kg/ml

d) g/l

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6. What is void ratio?

a) 1- (bulk density/apparent sp gr)

b) (bulk density/apparent sp gr) -1

c) 1- bulk density/apparent sp gr

d) bulk density/apparent sp gr -1

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7. The average specific gravity of natural aggregate is:

a) 2.7

b) 3

c) 1.5

d) 1

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8. Pick up the most appropriate statement from the following:

a) Sp. Gr. =c/a-b

b) Sp. Gr. =c/(a-b)

c) Sp. Gr. =a-b/c

d) Sp. Gr. =(a-b)/c

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9. The ratio of the mass of the aggregate dried in an oven at ___________ for 24 hours to the mass of the water occupying a volume equal to that of solid.

a) 100-110^{o}C

b) 150-180^{o}C

c) 100^{o}C

d) 1500^{o}C

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^{o}C for 3-4 hrs.

10. Aggregate abrasion value is determined by__________

a) Aggregates crushing strength

b) Los Angeles abrasion test

c) Aggregates Impact value test

d) Ten percent fine test

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## Set 4

1. Durability of concrete is proportional to _________

a) Sand content

b) Water cement ratio

c) Aggregate ratio

d) Cement aggregate ratio

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2. Strength of concrete show an increase with _________

a) Decrease in rate of loading

c) Increase in rate of loading

c) Unaffected by rate of loading

d) Depends on application of load

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3. Strength of concrete is ___________

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4. As per & 5456:200 Young’s modulus of concrete is _______________

a) 1000 f_{ck}

b) 5000 f_{ck}^{2}

c) 5700 f_{ck}

d) 150 f_{ck}

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_{ck}

^{2}is the formula of young’s modulus of the concrete according to IS 5456:200.

5. Strength of concrete is proportional to ______________

a) Sand content

b) Water cement ratio

c) Aggregate ratio

d) Cement water ratio

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6. Strength of concrete increase with _____________

a) Increase with w/c ratio

b) Decrease with w/c ratio

c) Decrease in size of aggregates

d) Decrease in curing time

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7. Strength of concrete increase with _________

a) Increase with w/c ratio

b) Increase in fineness of cement

c) Decrease in size of aggregates

d) Decrease in curing time

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8. Approximate ratio of the strength of the cement conc of 7 days to that of 28 days (2/3)

a) .75

b) .85

c) 1

d) 1.15

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9. Approximate ratio of strength of the 30 cm cube to that of 15 cm cube is _____________

a) 1.1

b) 1

c) .9

d) .75

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10. Approximate ratio of direct tensile strength to flexural strength is ____________

a) .25

b) .33

c) .5

d) .05

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## Set 5

1. Light weight cement content for compressive strength 2500 psi is _______ pounds per cubic yard.

a) 400-510

b) 440-560

c) 530-660

d) 630-750

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2. Light weight cement content for compressive strength 3000 psi is _______ pounds per cubic yard.

a) 400-510

b) 440-560

c) 530-660

d) 630-750

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3. Light weight cement content for compressive strength 4000 psi is _______ pounds per cubic yard.

a) 740-840

b) 440-560

c) 530-660

d) 630-750

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4. Light weight cement content for compressive strength 5000 psi is _______ pounds per cubic yard.

a) 400-510

b) 440-560

c) 530-660

d) 630-750

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5. Light weight cement content for compressive strength 6000 psi is _______ pounds per cubic yard.

a) 740-840

b) 440-560

c) 530-660

d) 630-750

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6. Light weight cement content for compressive strength 17.24 MPa is _______ kg/m^{3}.

a) 237-303

b) 261-332

c) 314-392

d) 373-445

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^{3}. 314-392 is the compressive strength of 27.58 MPa.

7. Light weight cement content for compressive strength 20.68 MPa is _______ kg/m^{3}.

a) 237-303

b) 261-332

c) 314-392

d) 373-445

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^{3}. 314-392 is the compressive strength of 27.58 MPa.

8. Light weight cement content for compressive strength 27.58 MPa is _______ kg/m^{3}.

a) 237-303

b) 261-332

c) 314-392

d) 373-445

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^{3}. 261-332 is the compressive strength of 20.68 MPa.

9. Light weight cement content for compressive strength 34.47MPa is _______ kg/m^{3}.

a) 237-303

b) 261-332

c) 314-392

d) 373-445

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^{3}. 314-392 is the compressive strength of 27.58 MPa.

10. Light weight cement content for compressive strength 41.37 MPa is _______ kg/m^{3}.

a) 237-303

b) 261-332

c) 314-392

d) 439 – 498

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^{3}. 314-392 is the compressive strength of 27.58 MPa.